php多线程抓取信息测试例子

只在php5.3以后的版本才真正的可以使用多线程序了,以前都是假的curl实现的多线程工作,下面我来给各位介绍几个多线程抓取信息测试例子,希望对各位会有帮助.

PHP 5.3 以上版本,使用pthreads PHP扩展,可以使PHP真正地支持多线程。多线程在处理重复性的循环任务，能够大大缩短程序执行时间。

PHP扩展下载：https://github.com/krakjoe/pthreads

PHP手册文档：http://php.net/manual/zh/book.pthreads.php

1、扩展的编译安装Linux,编辑参数 --enable-maintainer-zts 是必选项:

cd /Data/tgz/php-5.3.8 
./configure --prefix=/Data/apps/php --with-config-file-path=/Data/apps/php/etc --with-mysql=/Data/apps/mysql --with-mysqli=/Data/apps/mysql/bin/mysql_config --with-iconv-dir --with-freetype-dir=/Data/apps/libs --with-jpeg-dir=/Data/apps/libs --with-png-dir=/Data/apps/libs --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-fpm --enable-mbstring --with-mcrypt=/Data/apps/libs --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --enable-opcache --with-pdo-mysql --enable-maintainer-zts 
make clean 
make 
make install         
 
unzip pthreads-master.zip 
cd pthreads-master 
/Data/apps/php/bin/phpize 
./configure --with-php-config=/Data/apps/php/bin/php-config 
make 
make install

添加扩展:

vi /Data/apps/php/etc/php.ini

extension = "pthreads.so"

一段PHP多线程、与For循环,抓取百度搜索页面的PHP代码示例,代码如下:

<?php
class test_thread_run extends Thread {
    public $url;
    public $data;
    public function __construct($url) {
        $this->url = $url;
    }
    public function run() {
        if (($url = $this->url)) {
            $this->data = model_http_curl_get($url);
        }
    }
}
function model_thread_result_get($urls_array) {
    foreach ($urls_array as $key => $value) {
        $thread_array[$key] = new test_thread_run($value["url"]);
        $thread_array[$key]->start();
    }
    foreach ($thread_array as $thread_array_key => $thread_array_value) {
        while ($thread_array[$thread_array_key]->isRunning()) {
            usleep(10);
        }
        if ($thread_array[$thread_array_key]->join()) {
            $variable_data[$thread_array_key] = $thread_array[$thread_array_key]->data;
        }
    }
    return $variable_data;
}
function model_http_curl_get($url, $userAgent = "") {
    $userAgent = $userAgent ? $userAgent : &#39;Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)&#39;;
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_TIMEOUT, 5);
    curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);
    $result = curl_exec($curl);
    curl_close($curl);
    return $result;
}
for ($i = 0; $i < 100; $i++) {
    $urls_array[] = array(
        "name" => "baidu",
        "url" => "http://www.baidu.com/s?wd=" . mt_rand(10000, 20000)
    );
}
$t = microtime(true);
$result = model_thread_result_get($urls_array);
$e = microtime(true);
echo "多线程：" . ($e - $t) . "n";
//开源代码phprm.com
$t = microtime(true);
foreach ($urls_array as $key => $value) {
    $result_new[$key] = model_http_curl_get($value["url"]);
}
$e = microtime(true);
echo "For循环：" . ($e - $t) . "n";
?>

例子,采集数据,代码如下:

<?php
$urls = array(
    &#39;http://www.111cn.net/&#39;,
    &#39;http://www.sohu.com/&#39;,
    &#39;http://www.163.com/&#39;
);
$save_to = &#39;/test.txt&#39;; // 把抓取的代码写入该文件
$st = fopen($save_to, "a");
$mh = curl_multi_init();
foreach ($urls as $i => $url) {
    $conn[$i] = curl_init($url);
    curl_setopt($conn[$i], CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)");
    curl_setopt($conn[$i], CURLOPT_HEADER, 0);
    curl_setopt($conn[$i], CURLOPT_CONNECTTIMEOUT, 60);
    curl_setopt($conn[$i], CURLOPT_RETURNTRANSFER, true); // 设置不将爬取代码写到浏览器，而是转化为字符串
    curl_multi_add_handle($mh, $conn[$i]);
}
do {
    curl_multi_exec($mh, $active);
} while ($active);
foreach ($urls as $i => $url) {
    $data = curl_multi_getcontent($conn[$i]); // 获得爬取的代码字符串
    fwrite($st, $data); // 将字符串写入文件。当然，也可以不写入文件，比如存入数据库
    
} // 获得数据变量，并写入文件
foreach ($urls as $i => $url) {
    curl_multi_remove_handle($mh, $conn[$i]);
    curl_close($conn[$i]);
}
curl_multi_close($mh);
fclose($st);
?>

教程链接:

随意转载~但请保留教程地址★